Core-barrel.



P. M. REILLY.

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. Z d Mrc'oTeg/Z /f l( day? f5 Jig' PATRICK M. REILLY,

OF CHICAGO, ILLINOIS.

CORE-BARREL.

abaisse.

T o all whom it may concern:

Be it known that I, Pierrick M. Renan', a citizen oit' the United States, residing at Chicago, in the county o't (look and State oit Illinois, whose post-otlce address is care ot the Illinois Steel (ompany, South (thicago, Illinois, have invented new and use'lul Improvements in Core-larrels, ot which the following .is a specification. i

My invention relates to core barrels, and has particular reference to core barrels which are used in connection with the manufacture ot' ingot molds.

In order to render my invention inteli ligible, I will give a briet description oit' the operations in connection with which my improved core barrel is employed.

In the immu'tacture o:tl ingot molds, the .first operation is to inclose a core barrel within a core box and to ram molding sand in the space between these two parts. rlhe core box is then removed and the core barrel, to-which the sand adheres, is then baked in a core oven in the well known manner. The patterm which corresponds to the outside oli the mold to be made, is placed within a flask and sand is rammed between the pattern and the llask. This ttask is then removed rom the pattern and after the core, with its inclosed core barrel, has been suitably baked, the flask is placed outside ot the same. A cap is put in position on the upper end oit the core, thus preparing the mold for the casting ot' the ingot mold. The casting is preferably conducted through a gate so that the ingot mold is cast by the so-called bottom pour7 method.

After the ingot mold has cooled sutlieiently to become solidiiied, the inclosing tlask is raised by means ot a crane, which is provided with a bearing member which exerts pressure on the tapered inner member within the core barrel. As the Aflask is raised, the staves, forming the outer portion ot the core barrel, are raised a short distance with the flask and on accountot the taper oit lthe inner member, these staves become loosened 'trom the inside o't the ingot mold and drop down on to the drag :torming the bottom ot the mold.

The above description applies to the operation oi' casting ingot molds, as heretofore conducted. Several objections present themselves in the practical application of Specification of Letters Patent.

Application filed June 9,

Patented Aug. 22, 1911.

1910. Serial No. 566,119.

this method. .ln the tirst place the staves are not ilfastened to each other or to the inner member, so that a'tter the flask with its contained ingot mold has been removed, the staves are very apt to lall outwardly, with the result that a worlnnan will possibly be injured, of at any rate making it necessary to raise the slaves in order to restore them to their proper position on the inner member. Again, there is no method ot causing the stares to move in unison with each other.` which results in causing an unequal action o't the apparatus. A still :further disadvantage consists in the 'tact that sand is very apt to get' inside ot the stares between the same and the tapered inner member, thereby interlering with the operation oli the core barrel. lt is true that inclosing` bands are sometimes used to retain the stares in position, but it has been tou'nd by experience that these bands are very apt to become displaced, causing the stares to lall outwardly. as explained above.

ln my improved core barrel all of the above obiections are overcome. Opposite staves are connected with each other by means ot bolts, which allow the staves to move inwardly as the same are raised, whereas the nuts on these bolts prevent outward movement et the st'aves beyond a predeterl'nined position. At the corners where adjacent; staves abut against each other, an interlocking device is provided which causes the staves to be raised simultaneously and ett'mftually prevents independent action of the various individual staves. Tn order to prevent the accumulation ot sand between the staves and the tapered inner member, I provide holes in the drag.` through which the sand readily escapes, thus preventing interference with the operation ot the core barrel. These and other admntages ot my invention will be more readily understood by reference to the accompanying dra\\'ings, which show a preferred embfaliment ot my invention, in whieh,-

Figure 1 is a `vertical section and partly elevation view through my improved core barrel, showing the drag in position; Fig. Q is a side elevation ot the staves and end ot' the tapered inner member, showing the in terlocking device between adjacent staves, which are in their distendcd position; and Fig. 3 is a reduced, fragmentary plan and partly section view, taken on the line 3-3 of F ig. 1, showing the method of att-aching the tapered inner member to the drag, the staves being omitted from this view.

The inner tapered member 5 is provided with ears 6, and is attached to the drag 7 by means o1' the bolts 8. rlhis inner member is rectangular in shape and has an upward taper, as clearly shown in Fig. 1. Outside of each side of the member 5 is a stave 9, each stave being provided with an upper boss 10 and a lower boss 11. A bolt 12 passes through the bosses 10 on opposite staves and a second bolt 13 passes through bosses 10 on the staves which are disposed at a right angle to the staves through which the bolt 12 passes. Similarly bolts 14 and 15 pass through bosses 11 on opposite staves: Each of the bolts 12, 13, 14 and 15 has a head 16 and on its opposite end anut 17 ,having threaded engagement with the end of the bolt. In this way it will be apparent that opposite staves may be moved inwardly buty cannot be moved outwardly beyond a position which is defined by the head 16 and the nut 17. rlhe bosses 10 and 11 on each stave project into slots 18 and 19 in the upper and lower portions respectively Iof the member 5. As clearly shown in Fig. 1 these slots are adapted to allow movement of the staves 9 with respectI to the member 5, this movement being limited by the length of slots 18 and 19.

As best shown in Fig. 2, each of the staves 9 is provided with a projection 2O on its edge which fits within the corresponding recess 21 in the edge of the nextI adjacent stave, in this way causing the staves to be moved simultaneously and as a unit. In order to prevent sand from staying between the staves 9 and the member 5, I provide holes or openings 22 in the drag 7, and the sand readily passes outwardly through these holes.

The operation of my improved core barrel may now be readily understood. After the flask is in position and the ingot mold has been cast, downward pressure is exerted on the head 23 of' the tapered member 5, and at the same time the flask is moved upwardly. This causes the staves 9 to move upwardly with the iiask until the bosses 10 and 11 reach the upper ends of the slots 18 and 19 respectively. k,This upward movement of the staves causes themto move inwardly on account of the taper of the member 5 and the staves are thereby freed from the inside of the ingot mold. When this occurs, the retaining action of the inside of the ingot mold, of course, ceases and the staves drop downwardly by the action of gravity into the positions shown in Fig. 1. rEhe sand on the outside of the staves has meanwhile become broken by the movement of the staves and a large part of it drops o and the rest may be easily and expeditiously removed.

lt will be clear to those skilled in the art that many changes can be made in the detailed construction of the parts 1 have described without departing from the spirit of my invention.

lhat l claim is:

1. 1n a core barrel, the combination of a central tapered member, staves outside of and movable with respect to said central member, means for securing together opposite staves, and means for connecting adjacent staves, thereby causing said staves to be moved in unison, substantially as described.

2. In a core barrel, the combination of a central tapered member, a plurality of staves outside of said central member and movable with respect thereto, means for limiting the movement of said staves with respect to said central member, and interlocking means connecting adjacent staves, thereby causing the movement of said staves to be in unison, substantially as described.

3. 1n a core barrel, the'combination with a drag, of a tapered member attached thereto, a plurality of staves outside of said tapered member and movable with respect thereto, each stave having an inwardly projecting boss adapted to operate within a corresponding groove in said tapered member, said grooves thereby limiting the movement of said stavesv with respect to said tapered member, and means for interlocking adjacent staves, substantially as described.

4c. 1n a core barrel, the combination with a central tapered member, of a plurality of staves outside of said central member, each stave having an inwardly projecting boss adapted to'operate within a corresponding slot in said central member, and means for connecting oppositely disposed staves, thereby allowing inward movement of said staves when the latter are moved with respect to said central member but preventing outward movement of the staves beyond a predetermined position, substantially as described.

5. ln a core barrel, the combination with a central tapered member, of a plurality of staves movable with respect to said central member, and a drag att-ached to said central member, said drao being provided with sand openings, thereby conducting the sand from between the central member and the staves, substantially as described.

G. ln a core barrel, the combination of an inner tapered member, and a plurality of staves outside of said central member, adjacent staves being provided on their edges with interlocking means, substantially as described.

7. 1n a core barrel, the combination of a central tapered member having slots therein,

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a plurality of staves havinginwardly pro Staves beyond a predetermined position, subjeeting bosses adapted to operate Within said stantially as described.

slots, and bolts passing through eppositely 1 ,ATRICK M. REILLY. disposed bosses, thereby allowinginward movement off Said Staves when the latteil are VitnesSes:

moved with respect to said inner membeil WM. SEALY,

but preventing outward movement off the F. J. PETERS.

Copies of this patent may be obtained for five cents each, by addressing' the Commissioner of Patents, Washington, D. C. 

